You have a couple of things to fix there.
First, you want each of your columns to be separate from each other, you don't want one to be nested inside the other. You will need to close your first column just before you begin your second column.
Next, at the end of your second column you have three
</div> tags. One closes the thumbnail -- that's good, one closes the column -- also good, and one closes the row -- that's bad. You don't want to close your row until after the third and final column is closed.
Don't forget to add closing tags for the container and neighborhood-guides divs.
5., 6. & 7. Some advice to help you control your divs